Digital filter banks with approximately liner phase

In this paper uniform and nonuniform digital filter banks based on approximately linear phase IIR filters and frequency response masking technique (FRM) are presented. Both solutions are realized as a connection of interpolated half-band approximately linear phase IIR filter as a first stage filter of the FRM design and appropriate number of masking filters. Masking filters are half-band IIR filters with approximately linear phase. Filter banks are compared with linear phase FIR filter banks with similar magnitude responses.